JP3871888B2 - Squeegee for floor cleaning machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a floor surface cleaning machine for cleaning a floor surface by spraying a cleaning liquid and rotating a cleaning brush or pad while moving a vehicle body. Specifically, the present invention relates to a cleaning brush or pad. The present invention relates to a squeegee for a floor cleaning machine that collects the cleaning sewage generated after cleaning by rotating the squeegee from the floor by the suction action of a blower.
[0002]
[Prior art]
With respect to squeegees for floor cleaning machines, conventionally, within the interval between two front and rear squeegee blades (rubber blades) as seen in, for example, Japanese Utility Model Laid-Open No. 63-18966 and Japanese Patent Laid-Open No. 9-299303. In addition, a type that sucks and collects washed sewage from the floor surface by applying a suction action of a blower is used.
[0003]
[Problems to be solved by the invention]
However, in the conventional squeegees, as shown in FIG. 12, the front and rear squeegee blades attached to both sides of the squeegee frame 31 are provided with a suction pipe 30 for connecting a blower side suction hose at the center of the squeegee frame 31. Since the suction action is exerted through the vent hole 30A within the interval 31X between 32 and 33, a strong suction action can be exerted on the central portion of the squeegee, but the left and right sides of the squeegee formed as a whole are horizontally long. A sufficient suction action cannot be exerted on both end sides, and as a result, there is a problem in that the wastewater recovery rate is insufficient and sewage is left behind on the floor surface. Incidentally, the average sewage recovery rate of the conventional squeegee is about 91.1%. According to the experiment, for example, when 20 liters of cleaning liquid is sprayed, the recovery amount is about 18.22 liters. It was found that an amount of cleaning liquid remained on the floor.
[0004]
Further, when slender thread-like dust such as hair is present on the floor surface, when the floor surface F is washed with a floor washing machine and sewage is sucked with a squeegee, the thread-like dust is squeegee blades 32, 33. However, there is a problem in that fine streaks are left behind on the floor surface F due to entangled thread-like dust, which makes the finish dirty.
[0005]
Therefore, the technical problem of the present invention is to improve the suction performance by spreading the suction action of the blower over the entire squeegee, thereby improving the squeegee's sewage recovery rate. It is intended to provide a squeegee for a floor cleaning machine that is devised so as not to leave a thin streaky trace.
[0006]
[Means for Solving the Problems]
(1) In order to solve the above technical problem, in the present invention, as described in the first aspect of the present invention, the frame plates before and after the squeegee frame formed in a substantially arcuate shape that is curved in the traveling direction at both the left and right ends. By attaching two flexible squeegee blades at an interval and applying the suction action of the blower within the squeegee interval formed by these front and rear squeegee blades, cleaning sewage generated by the cleaning rotation of the cleaning brush or pad is reduced. a squeegee for configuration the floor washer to aspirate from the floor, the upper central portion of the squeegee frame, in the above-described squeegee distance through the suction tube which is provided on the upper surface of the squeegee frame suction effect of the blower A vent hole that can be exerted is formed , and a squeegee is formed below the vent hole and in a central bottom portion of the squeegee frame. Partition between the vent hole and squeegee spacing frame, and, on the rear side with respect to the traveling direction of the squeegee, is open the communication passage of the elongated opening shape communicating between the vent hole and squeegee interval which such squeegee frame bottom The plate is fixed with mounting screws, and among the front and rear squeegee blades attached to the squeegee frame, a number of notch grooves are provided at intervals on the lower edge of the front squeegee blade with respect to the squeegee advance direction, The interval between these notch grooves is configured to become narrower toward both ends of the squeegee .
[0007]
According to the above means (1), the sewage on the floor surface is firstly removed by the suction action of the blower that has passed through the elongated opening-shaped communication path of the bottom plate and into the space between the front and rear squeegee blades. Can be sucked into the interval of the squeegee frame on the bottom plate, and then this sewage can be sent from the ventilation hole to the blower side through the flexible hose etc. Compared to a conventional squeegee that sucks directly to the blower through a suction pipe and a flexible hose, it is possible to increase the suction efficiency and improve the recovery rate of sewage.
[0008]
Further, the suction force inside the squeegee by the blower becomes weaker as it goes in the direction of both ends of the squeegee from the central part, that is, in the direction away from the central part. The gap between the notch grooves on the squeegee blade on the front side is made narrower toward the tip of the squeegee to increase the amount of sewage sucked into the squeegee (the amount of external air). It is possible to exert a substantially uniform suction force .
[0009]
( 2 ) In the present invention, as described in claim 2 , the squeegee frame, the front and rear squeegee blades, and the floor surface located below the bottom plate when the suction action of the blower is applied within the squeegee interval. and the cross-sectional area of the space (C) formed between, the cross-sectional area of the communication passage of the bottom plate and (B), and when the cross-sectional area of the suction pipe (a), the relationship between the cross-sectional area The configuration is such that C <B <A.
[0010]
( 3 ) Further, in the present invention, as described in the third aspect , the relationship between the cross-sectional areas A, B, and C is as follows: B = 0.1A to 0.3A, C = 0.05A to 0.2A. It is comprised so that it may become.
[0011]
According to the means described in ( 2 ) and ( 3 ) above, the cross-sectional area of the suction path in the squeegee is configured such that C <B <A, that is, the step size decreases step by step. Therefore, the suction of the sewage from the floor surface can be reliably performed with a strong force, and the sucked sewage can be smoothly sent out toward the blower.
[0012]
As described above, the technical problems described above can be solved by the means (1) to ( 3 ), and the problems of the conventional techniques can be solved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the embodiment of the squeegee for floor cleaning machine according to the present invention described above will be described with reference to the drawings. FIG. 1 is a side sectional view illustrating the entire floor cleaning machine implementing the squeegee of the present invention, FIG. Is a plan sectional view thereof. In these drawings, reference numeral 1 denotes the entire body of the floor cleaning machine, and the whole is the upper half lid portion 1Y and the lid body. The portion 1Y is configured by a lower half vehicle body portion 1X that can be opened and closed using a connection fitting (not shown) such as a hinge or the like, and is detachably attached.
[0014]
The lid portion 1Y is substantially entirely composed of a hollow sewage tank 10 using a synthetic resin material, etc., and has an opening / closing lid 10A on the upper surface portion, and a recessed section provided in the center of the inner bottom portion. A suction blower 7 operated by a DC motor 7M is attached inside the chamber, and the suction action of the suction blower 7 is provided from the inside of the sewage tank 10 to the rear part of the machine body 1 through a recovery hose 8 (flexible hose). The squeegee 20 according to the present invention is sucked and collected in the sewage tank 10 from the collection hose 8 through the tip port 8A of the sewage DW remaining on the floor surface by rotational cleaning of a cleaning brush (pad) described later. It is structured.
[0015]
The vehicle body 1X is made of a synthetic resin material or the like, and is formed in a substantially box shape with its upper surface and one end surface (right end surface in the drawing) open, and its left end surface (front side). The left and right side walls, and the bottom plate are both formed into hollow cleaning liquid tanks 9A and 9B for the cleaning liquid CW that communicate with each other, and the interior of the vehicle body portion 1X with the upper surface and the right end surface open. The space is an installation space for the battery 4 for power supply and the motor 4M for rotating the cleaning brush 5.
[0016]
The motor 4M is fixed to the bottom plate portion in the vehicle body 1X on which the brush motor 4M is mounted using a motor base, and the rotating shaft 4X protrudes through a reduction gear on the lower side of the motor 4M. By attaching the cleaning brush 5 (pad) to the mounting board 4 provided on the shaft 4X and rotating at high speed, the cleaning liquid CW is supplied to the cleaning brush 5 from the cleaning liquid tanks 9A and 9B by a pump (not shown). It is configured to clean the floor surface.
[0017]
Further, in the figure, reference numerals 2 and 3 denote traveling wheels attached to the bottom of the vehicle body 1X, and among these wheels, the rear wheel 2 in particular is a driving wheel that is rotated by a motor (not shown). Further, 1T is a driving handle, 1P is an operation panel provided at the rear of the vehicle body 1, 11 is a hose for draining sewage connected to the sewage tank 10, and 9Y is a cleaning liquid tank 9A that is supplied with a cleaning liquid CW opened at the front part of the lid. , 9B is a water supply port, 9X is an open / close lid that covers this water supply port 9Y, 8B is a suction pipe of the squeegee 20 that connects the lower end port of the recovery hose 8, and 12 is provided in the rear part of the vehicle body 1 A squeegee lever for turning ON / OFF the suction blower motor 7M and raising and lowering the squeegee 20, 13 a brush ground pressure adjusting lever, and 20 'a connecting plate for connecting the squeegee 20 to the rear portion of the vehicle body 1.
[0018]
3 is a front view illustrating the configuration of the squeegee 20 according to the present invention, FIG. 4A is a plan view thereof, and FIG. 3B is a bottom view thereof. Is a nozzle connected to the lower side of the suction pipe 8B, and 20T is curved in the direction of travel of the squeegee 20 at both the left and right ends, so that the shape in plan view is substantially as shown in FIGS. The squeegee frame is formed in an arcuate shape and has a substantially U-shaped cross section. The nozzle 8C of the suction pipe 8B is formed on the upper edge portion of the vent hole 20Z provided in the center of the upper surface of the squeegee frame 20T. The suction pipe 8B is attached to the central portion of the upper surface of the squeegee frame 20T in a state where it is communicated with the vent hole 20Z by fixing the flange 8T continuously provided with screws 26 and 26.
[0019]
21 and 22 are the front and rear sides of the squeegee frame 20T that are attached to the inner and outer frame plates (front and rear with respect to the direction of travel) with mounting screws 24. Squeegee blades 23 and 23 are guide rollers attached to both ends of the squeegee 20, and in FIGS. 3, 5, and 6, 21R and 22R attach both squeegee blades 21 and 22 to the front and rear frame surfaces of the squeegee frame 20T. In FIG. 8 to FIG. 11, reference numeral 20R denotes a squeegee interval constituted by the front and rear squeegee blades 21 and 22. The suction blower 7 is configured to have a suction action through the recovery hose 8, the suction pipe 8B, the nozzle 8C, and the vent hole 20Z.
[0020]
Incidentally, the squeegee frame 20T described above, the width of the central portion obvious as vent 20Z opened formed from the description of FIG. 4 is the most widely configuration, is configured to gradually narrow the width toward the left and right tip side As a result, the above-described squeegee interval 20R is widest at the center portion and is configured to gradually narrow toward the left and right tip sides, so that a strong suction force is exerted on the tip side, and the tip It is structured to maintain the suction of sewage from the center to the center.
[0021]
FIGS. 7A and 7B are front views illustrating the configuration of the rear squeegee blade 22 and the front squeegee blade 21 described above. Holes 22X ..., 21X ... are provided, and as both squeegee blades 21, 22, for example, a rubber material having a hardness of 40 ° (± 5) is used, and the lower end sides 21S, 22S of both blades are used. When the suction action of the suction blower 7 is exerted on the squeegee interval 20R in a state where the squeegee is in contact with the floor F, the lower ends 21S and 22S of the squeegee blades 21 and 22 are shown in FIG. In this way, it is configured such that it is bent and bonded to the floor surface and is pulled by the floor cleaning machine and moved forward in the left direction in each figure while maintaining this bonded surface state. In FIG. 7C, the surface contact width of each lower end side 21S, 22S indicated by the symbol L is 3-7 mm, and slender thread-like dust like hair is squeegee blade 21, Even if it is entangled with 22, it is configured so that unsucked sewage is not left on the floor surface in the stringing state.
[0022]
Further, among the front and rear squeegee blades, on the lower end side 21S of the front squeegee blade 21, a large number of notch grooves 21A for taking in sewage are formed side by side as shown in FIG. As shown in the figure, the interval between adjacent cutout grooves 21A is wide at the center side and narrow at the left and right tip sides so that a substantially uniform suction force can be exhibited over the entire length of the squeegee. .
[0023]
5 is an enlarged bottom view of the central portion of the squeegee 20, and FIG. 6A is a partially broken front view of the central portion of the squeegee 20 before the suction blower 7 starts operation. The figure is a partially broken front view of the central portion of the squeegee 20 in a state in which the suction blower 7 is performing a suction operation. In these drawings, reference numeral 25 denotes a vent hole 20Z of the squeegee frame 20T. in the lower, and so as to face the vent hole 20Z, squeegee frame mounting screw 26 in the central bottom portion of the 20T ', 26' in the bottom plate fixed with one side edge of the bottom plate 25, i.e., the edge of the rear side with respect to the traveling direction of the squeegee 20 is notched formed notch 25X, the communication passage 27 of the elongated opening shape in transverse communicating between the vent hole 20Z and squeegee gap 20R is configured There.
[0024]
8 and 9 show the state of the squeegee blades 21 and 22 before and after the suction blower 7 is not operating, the distance between the suction pipe 8B, the communication path 27, and the bottom plate 25. The cross-sectional shape of 20R (sections AA, BB, and C section details) is shown, and each sectional area is AA = 992 mm2, BB = 185 mm2, and C section details = 311 mm2. Of course, any of these numbers is an example of implementation.
[0025]
On the other hand, FIG. 10 and FIG. 11 show the AA in the state where the suction blower 7 is operated for suction and the lower ends 21S and 22S of the front and rear squeegee blades 21 and 22 are bent by the suction force. The cross section, the BB cross section, and the details of the C section are explained. Incidentally, the cross sectional areas of the respective sections are AA = 992 mm2, BB = 185 mm2, and the C section details = 87 mm2. The condition of C <B <A described in Item 5 and the conditions of B = 0.1A to 0.3A and C = 0.05A to 0.2A described in Claim 6 are satisfied.
[0026]
Therefore, when the suction operation of the suction blower 7, the cross-sectional area of the suction path comprising the suction pipe 8B and the communication path 27 and the squeegee gap 20R, to reduce stepwise toward the first, suction of sewage DW from the floor F The suctioned sewage DW can be smoothly sent out to the suction blower 7 side, that is, the sewage tank 10 side through the recovery hose 8.
[0027]
In the present invention, as described above, the bottom plate 25 having the communication passage 27 opened is attached to the lower side of the vent hole 20Z , so that the suction efficiency of the sewage DW can be increased and the recovery rate can be improved. Thus, for example, the squeegee 20 of the present invention can improve the sewage recovery rate of the conventional squeegee shown in FIGS. 12 and 13 to about 96.84%. Furthermore, for example, when 20 liters of cleaning liquid is sprayed on the floor surface F, it has been found as a result of experiments that the recovered amount is around 19.37 liters.
[0028]
In the conventional squeegee shown in FIGS. 12 and 13, the cross-sectional areas were AA = 1225 mm 2, BB = 873 mm 2, and C section details = 575 mm 2.
[0029]
【The invention's effect】
As described above, according to the squeegee for a floor cleaning machine according to the present invention, an excellent suction action can be exhibited and at the same time the sewage recovery rate can be improved. It has the advantage that it can obtain a sewage suction force, and even if thread-like dust such as hair gets tangled, it also has the advantage that the sewage on the floor surface can be sucked up cleanly so as not to leave a string of leftovers. Therefore, the quality of the floor cleaning by the floor cleaning machine can be further improved.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing an example of a floor cleaning machine using a squeegee according to the present invention.
FIG. 2 is a plan sectional view of the floor cleaning machine shown in FIG.
FIG. 3 is a front view of a squeegee according to the present invention.
4A is a plan view of the squeegee shown in FIG. 3, and FIG. 4B is a bottom view thereof.
FIG. 5 is a bottom view of a squeegee showing an enlarged configuration of a main part of the present invention.
6A is a partially cutaway front view of the main part of the present invention, and FIG. 6B is a partially cutaway front view of the main part during the suction operation.
7A is a front view of the rear squeegee blade, FIG. 7B is a front view of the front squeegee blade, and FIG. 7C is a diagram illustrating a bent state and a surface contact state at the lower end side of each squeegee blade. FIG.
FIG. 8 is a side sectional view of a squeegee according to the present invention.
9A and 9B are cross-sectional views taken along lines AA and BB in FIG. 8, respectively, and FIG. 9C is a detailed view of a portion C in FIG.
FIG. 10 is a side sectional view of the squeegee according to the present invention during suction operation.
11A and 11B are cross-sectional views taken along lines AA and BB in FIG. 10, respectively, and FIG. 11C is a detailed view of a portion C in FIG.
FIG. 12 is a side sectional view of a conventional squeegee.
13A and 13B are cross-sectional views taken along lines AA and BB in FIG. 12, respectively, and FIG. 13C is a detailed view of a portion C in FIG.
[Explanation of symbols]
1 Car body of floor cleaning machine 5 Cleaning brush or pad 7 Suction blower 8 Collection hose (flexible hose)
8B Suction pipe 10 Collection tank 20 Squeegee 20T Squeegee frame 20Z Vent hole 20R Squeegee spacing 21, 22 Squeegee blade 21A Notch groove 21S, 22S Lower end side of squeegee blade 25 Bottom plate 25X Notch 27 Communication path F Floor surface

Claims (3)

Two flexible squeegee blades are attached to the front and rear frame surfaces of a squeegee frame that is curved in the direction of travel at the left and right ends , and the squeegee is constituted by these front and rear squeegee blades. A squeegee for a floor cleaning machine configured to suck cleaning sewage generated by cleaning rotation of a cleaning brush or pad from the floor by exerting a suction action of a blower within an interval,
A vent hole capable of exerting the suction action of the blower through the suction pipe provided on the upper surface of the squeegee frame in the squeegee interval is formed in the central portion of the upper surface of the squeegee frame , and below the vent hole , In addition, the central bottom portion of the squeegee frame partitions the space between the ventilation holes and the squeegee interval of the squeegee frame , and the rear side of the squeegee frame between the ventilation holes and the distance between the squeegees. The bottom plate that opens the communication path in the form of an elongated opening that communicates is fixed by attaching screws, and the lower edge of the squeegee blade on the front side of the front and rear squeegee blades attached to the squeegee frame. A large number of notch grooves are provided at intervals, and the intervals between these notch grooves become narrower toward both ends of the squeegee. Squeegee for floor cleaning machine which is characterized by being configured such that. When the suction action of the blower is exerted within the squeegee interval, the sectional area of the space formed by the squeegee frame, the front and rear squeegee blades and the floor surface located on the lower side of the bottom plate is defined as (C). When the cross-sectional area of the communication path is (B) and the cross-sectional area of the suction pipe is (A), the relationship between the cross-sectional areas is C <B <A. Item 2. The squeegee for a floor cleaning machine according to Item 1. The floor according to claim 2, wherein the cross-sectional areas A, B, and C are configured such that B = 0.1A to 0.3A and C = 0.05A to 0.2A. Squeegee for face washer.

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